Touch may actually become more sensitive, as the others diminish. I have never heard than touch ever goes away with age. Sight and hearing are the first to go and.... And.... Oh yeah memory.
As one ages the senses become less efficient, Smells are not quite as fragrant, Taste not as tasty and vision not what your thought it was and noises not as loud as you may remember. Other will most likely let you know the difference is you can still see and hear them! Age plays a dirty trick and takes away a little at a time a lot of the sense and feelings of youth.